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# CHAINTECH COMPUTER COMPANY, LTD.
4SPM.3/4SPM5.1
Processor 80486SX/ODP486SX/CX486DX/AM486DX/80486DX/UMCU5S/CX486DX2/
CX486DX2V/AM486DX2/(SL)AM486DX2/80486DX2/P24D/AM486DX4/ 80486DX4/Pentium
Overdrive
Processor 25/33/40/50(internal)/50/66(internal)/75(internal)/80(internal)/83(internal)/
Speed 100(internal)MHz
Chip Set UMC
Max. 128MB
Onboard
DRAM
Cache 128/256/512/1024KB
BIOS Award
Dimensions 250mm x 220mm
I/O 32-bit PCI slots (3), floppy drive interface, game port, green PC connector,
Options IDE interfaces (2), parallel port, serial ports (2)
NPU None
Options
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-------------------+----------+------------------+----------|
| Floppy drive | CN1 | IDE interface | JP15 |
| interface | | LED 2 | |
|-------------------+----------+------------------+----------|
| Serial port 1 | CN2 | Green PC LED | JP27 |
|-------------------+----------+------------------+----------|
| Serial port 2 | CN3 | Green PC | JP29 |
| | | connector | |
|-------------------+----------+------------------+----------|
| Parallel port | CN4 | Turbo switch | JP35 |
|-------------------+----------+------------------+----------|
| Game port | CN5 | Turbo LED | JP36 |
|-------------------+----------+------------------+----------|
| IDE interface 2 | CN6 | Speaker | JP37 |
|-------------------+----------+------------------+----------|
| IDE interface 1 | CN7 | Reset switch | JP44 |
|-------------------+----------+------------------+----------|
| External battery | JP12 | Power LED & | JP45 |
| | | keylock | |
|-------------------+----------+------------------+----------|
| IDE interface LED | JP14 | 32-bit PCI slots | PC1 - |
| 1 | | | PC3 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------------+--------+------------|
| » | CMOS memory normal operation | JP13 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | CMOS memory clear | JP13 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | PCI bus clock select CPU clock | JP21 | pins 1 & 2 |
| | speed | | closed |
|---+----------------------------------+--------+------------|
| | PCI bus clock select 1/2 CPU | JP21 | pins 2 & 3 |
| | clock speed | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|------+-------------+-------------+------------+------------|
| 1MB | (1) 256K x | NONE | NONE | NONE |
| | 36 | | | |
|------+-------------+-------------+------------+------------|
| 2MB | (1) 256K x | (1) 256K x | NONE | NONE |
| | 36 | 36 | | |
|------+-------------+-------------+------------+------------|
| 2MB | (1) 512K x | NONE | NONE | NONE |
| | 36 | | | |
|------+-------------+-------------+------------+------------|
| 3MB | (1) 512K x | (1) 256K x | NONE | NONE |
| | 36 | 36 | | |
|------+-------------+-------------+------------+------------|
| 3MB | (1) 256K x | (1) 256K x | (1) 256K x | NONE |
| | 36 | 36 | 36 | |
|------+-------------+-------------+------------+------------|
| 4MB | (1) 512K x | (1) 256K x | (1) 256K x | NONE |
| | 36 | 36 | 36 | |
|------+-------------+-------------+------------+------------|
| 4MB | (1) 256K x | (1) 256K x | (1) 256K x | (1) 256K x |
| | 36 | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 4MB | (1) 1M x 36 | NONE | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 4MB | (1) 512K x | (1) 512K x | NONE | NONE |
| | 36 | 36 | | |
|------+-------------+-------------+------------+------------|
| 5MB | (1) 1M x 36 | (1) 256K x | NONE | NONE |
| | | 36 | | |
|------+-------------+-------------+------------+------------|
| 5MB | (1) 512K x | (1) 256K x | (1) 256K x | (1) 256K x |
| | 36 | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 6MB | (1) 1M x 36 | (1) 256K x | (1) 256K x | NONE |
| | | 36 | 36 | |
|------+-------------+-------------+------------+------------|
| 6MB | (1) 512K x | (1) 1M x 36 | NONE | NONE |
| | 36 | | | |
|------+-------------+-------------+------------+------------|
| 6MB | (1) 512K x | (1) 512K x | (1) 512K x | NONE |
| | 36 | 36 | 36 | |
|------+-------------+-------------+------------+------------|
| 7MB | (1) 1M x 36 | (1) 256K x | (1) 256K x | (1) 256K x |
| | | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 8MB | (1) 1M x 36 | (1) 1M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 8MB | (1) 2M x 36 | NONE | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 8MB | (1) 512K x | (1) 512K x | (1) 512K x | (1) 512K x |
| | 36 | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 9MB | (1) 2M x 36 | (1) 256K x | NONE | NONE |
| | | 36 | | |
|------+-------------+-------------+------------+------------|
| 10MB | (1) 2M x 36 | (1) 256K x | (1) 256K x | NONE |
| | | 36 | 36 | |
|------+-------------+-------------+------------+------------|
| 10MB | (1) 512K x | (1) 1M x 36 | (1) 1M x | NONE |
| | 36 | | 36 | |
|------+-------------+-------------+------------+------------|
| 10MB | (1) 512K x | (1) 2M x 36 | NONE | NONE |
| | 36 | | | |
|------+-------------+-------------+------------+------------|
| 11MB | (1) 2M x 36 | (1) 256K x | (1) 256K x | (1) 256K x |
| | | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 12MB | (1) 1M x 36 | (1) 2M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 12MB | (1) 2M x 36 | (1) 1M x 36 | NONE | NONE |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|------+-------------+-------------+------------+------------|
| 12MB | (1) 1M x 36 | (1) 1M x 36 | (1) 1M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 14MB | (1) 512K x | (1) 1M x 36 | (1) 1M x | (1) 1M x |
| | 36 | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 16MB | (1) 2M x 36 | (1) 1M x 36 | (1) 1M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 16MB | (1) 1M x 36 | (1) 1M x 36 | (1) 1M x | (1) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 16MB | (1) 2M x 36 | (1) 2M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 16MB | (1) 4M x 36 | NONE | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 17MB | (1) 4M x 36 | (1) 256K x | NONE | NONE |
| | | 36 | | |
|------+-------------+-------------+------------+------------|
| 18MB | (1) 4M x 36 | (1) 256K x | (1) 256K x | NONE |
| | | 36 | 36 | |
|------+-------------+-------------+------------+------------|
| 18MB | (1) 512K x | (1) 2M x 36 | (1) 2M x | NONE |
| | 36 | | 36 | |
|------+-------------+-------------+------------+------------|
| 18MB | (1) 512K x | (1) 4M x 36 | NONE | NONE |
| | 36 | | | |
|------+-------------+-------------+------------+------------|
| 19MB | (1) 4M x 36 | (1) 256K x | (1) 256K x | (1) 256K x |
| | | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 20MB | (1) 1M x 36 | (1) 2M x 36 | (1) 2M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 20MB | (1) 1M x 36 | (1) 4M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 20MB | (1) 2M x 36 | (1) 1M x 36 | (1) 1M x | (1) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 20MB | (1) 4M x 36 | (1) 1M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 24MB | (1) 2M x 36 | (1) 4M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 24MB | (1) 4M x 36 | (1) 1M x 36 | (1) 1M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 24MB | (1) 4M x 36 | (1) 2M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 24MB | (1) 2M x 36 | (1) 2M x 36 | (1) 2M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 26MB | (1) 512K x | (1) 2M x 36 | (1) 2M x | (1) 2M x |
| | 36 | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 28MB | (1) 1M x 36 | (1) 2M x 36 | (1) 2M x | (1) 2M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 28MB | (1) 4M x 36 | (1) 1M x 36 | (1) 1M x | (1) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 32MB | (1) 4M x 36 | (1) 2M x 36 | (1) 2M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 32MB | (1) 2M x 36 | (1) 2M x 36 | (1) 2M x | (1) 2M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 32MB | (1) 4M x 36 | (1) 4M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 32MB | (1) 8M x 36 | NONE | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 33MB | (1) 8M x 36 | (1) 256K x | NONE | NONE |
| | | 36 | | |
|------+-------------+-------------+------------+------------|
| 34MB | (1) 8M x 36 | (1) 256K x | (1) 256K x | NONE |
| | | 36 | 36 | |
|------+-------------+-------------+------------+------------|
| 34MB | (1) 512K x | (1) 4M x 36 | (1) 4M x | NONE |
| | 36 | | 36 | |
|------+-------------+-------------+------------+------------|
| 34MB | (1) 512K x | (1) 8M x 36 | NONE | NONE |
| | 36 | | | |
|------+-------------+-------------+------------+------------|
| 35MB | (1) 8M x 36 | (1) 256K x | (1) 256K x | (1) 256K x |
| | | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 36MB | (1) 1M x 36 | (1) 4M x 36 | (1) 4M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 36MB | (1) 1M x 36 | (1) 8M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 36MB | (1) 8M x 36 | (1) 1M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 40MB | (1) 2M x 36 | (1) 4M x 36 | (1) 4M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 40MB | (1) 2M x 36 | (1) 8M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 40MB | (1) 4M x 36 | (1) 2M x 36 | (1) 2M x | (1) 2M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 40MB | (1) 8M x 36 | (1) 1M x 36 | (1) 1M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 40MB | (1) 8M x 36 | (1) 2M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 44MB | (1) 8M x 36 | (1) 1M x 36 | (1) 1M x | (1) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 48MB | (1) 4M x 36 | (1) 8M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 48MB | (1) 8M x 36 | (1) 2M x 36 | (1) 2M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 48MB | (1) 8M x 36 | (1) 4M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 48MB | (1) 4M x 36 | (1) 4M x 36 | (1) 4M x | NONE |
| | | | 36 | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|-------+-------------+------------+------------+------------|
| 50MB | (1) 512K x | (1) 4M x | (1) 4M x | (1) 4M x |
| | 36 | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 52MB | (1) 1M x 36 | (1) 4M x | (1) 4M x | (1) 4M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 56MB | (1) 2M x 36 | (1) 4M x | (1) 4M x | (1) 4M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 56MB | (1) 8M x 36 | (1) 2M x | (1) 2M x | (1) 2M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 64MB | (1) 8M x 36 | (1) 4M x | (1) 4M x | NONE |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 64MB | (1) 4M x 36 | (1) 4M x | (1) 4M x | (1) 4M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 64MB | (1) 8M x 36 | (1) 8M x | NONE | NONE |
| | | 36 | | |
|-------+-------------+------------+------------+------------|
| 64MB | (1) 16M x | NONE | NONE | NONE |
| | 36 | | | |
|-------+-------------+------------+------------+------------|
| 65MB | (1) 16M x | (1) 256K x | NONE | NONE |
| | 36 | 36 | | |
|-------+-------------+------------+------------+------------|
| 66MB | (1) 16M x | (1) 256K x | (1) 256K x | NONE |
| | 36 | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 66MB | (1) 512K x | (1) 8M x | (1) 8M x | NONE |
| | 36 | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 66MB | (1) 512K x | (1) 16M x | NONE | NONE |
| | 36 | 36 | | |
|-------+-------------+------------+------------+------------|
| 67MB | (1) 16M x | (1) 256K x | (1) 256K x | (1) 256K x |
| | 36 | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 68MB | (1) 1M x 36 | (1) 8M x | (1) 8M x | NONE |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 68MB | (1) 1M x 36 | (1) 16M x | NONE | NONE |
| | | 36 | | |
|-------+-------------+------------+------------+------------|
| 68MB | (1) 16M x | (1) 1M x | NONE | NONE |
| | 36 | 36 | | |
|-------+-------------+------------+------------+------------|
| 72MB | (1) 2M x 36 | (1) 8M x | (1) 8M x | NONE |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 72MB | (1) 2M x 36 | (1) 16M x | NONE | NONE |
| | | 36 | | |
|-------+-------------+------------+------------+------------|
| 72MB | (1) 16M x | (1) 1M x | (1) 1M x | NONE |
| | 36 | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 72MB | (1) 16M x | (1) 2M x | NONE | NONE |
| | 36 | 36 | | |
|-------+-------------+------------+------------+------------|
| 76MB | (1) 16M x | (1) 1M x | (1) 1M x | (1) 1M x |
| | 36 | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 80MB | (1) 4M x 36 | (1) 8M x | (1) 8M x | NONE |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 80MB | (1) 4M x 36 | (1) 16M x | NONE | NONE |
| | | 36 | | |
|-------+-------------+------------+------------+------------|
| 80MB | (1) 8M x 36 | (1) 4M x | (1) 4M x | (1) 4M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 80MB | (1) 16M x | (1) 2M x | (1) 2M x | NONE |
| | 36 | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 80MB | (1) 16M x | (1) 4M x | NONE | NONE |
| | 36 | 36 | | |
|-------+-------------+------------+------------+------------|
| 88MB | (1) 16M x | (1) 2M x | (1) 2M x | (1) 2M x |
| | 36 | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 96MB | (1) 8M x 36 | (1) 16M x | NONE | NONE |
| | | 36 | | |
|-------+-------------+------------+------------+------------|
| 96MB | (1) 16M x | (1) 4M x | (1) 4M x | NONE |
| | 36 | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 96MB | (1) 16M x | (1) 8M x | NONE | NONE |
| | 36 | 36 | | |
|-------+-------------+------------+------------+------------|
| 96MB | (1) 8M x 36 | (1) 8M x | (1) 8M x | NONE |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 98MB | (1) 512K x | (1) 8M x | (1) 8M x | (1) 8M x |
| | 36 | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 100MB | (1) 1M x 36 | (1) 8M x | (1) 8M x | (1) 8M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 104MB | (1) 2M x 36 | (1) 8M x | (1) 8M x | (1) 8M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 112MB | (1) 4M x 36 | (1) 8M x | (1) 8M x | (1) 8M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 112MB | (1) 16M x | (1) 4M x | (1) 4M x | (1) 4M x |
| | 36 | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 128MB | (1) 16M x | (1) 8M x | (1) 8M x | NONE |
| | 36 | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 128MB | (1) 8M x 36 | (1) 8M x | (1) 8M x | (1) 8M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 128MB | (1) 16M x | (1) 16M x | NONE | NONE |
| | 36 | 36 | | |
|------------------------------------------------------------|
| Note: Board also accepts x 32 SIMMs. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | TAG |
|-------------+---------------+---------------+--------------|
| 128KB | (4) 32K x 8 | NONE | (1) 8K x 8 |
|-------------+---------------+---------------+--------------|
| 256KB (A) | (4) 32K x 8 | (4) 32K x 8 | (1) 32K x 8 |
|-------------+---------------+---------------+--------------|
| 256KB (B) | (4) 64K x 8 | NONE | (1) 32K x 8 |
|-------------+---------------+---------------+--------------|
| 512KB (A) | (4) 64K x 8 | (4) 64K x 8 | (1) 32K x 8 |
|-------------+---------------+---------------+--------------|
| 512KB (B) | (4) 128K x 8 | NONE | (1) 32K x 8 |
|-------------+---------------+---------------+--------------|
| 1MB | (4) 128K x 8 | (4) 128K x 8 | (1) 64K x 8 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | JP17 | JP18 | JP19 | JP20 | JP25 | JP26 |
|-----------+--------+-------+-------+-------+-------+-------|
| 128KB | 1 & 2 | 2 & 3 | 2 & 3 | 1 & 2 | 1 & 2 | 1 & 2 |
|-----------+--------+-------+-------+-------+-------+-------|
| 256KB (A) | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 | 1 & 2 |
|-----------+--------+-------+-------+-------+-------+-------|
| 256KB (B) | 1 & 2 | 2 & 3 | 1 & 2 | 1 & 2 | 2 & 3 | 1 & 2 |
|-----------+--------+-------+-------+-------+-------+-------|
| 512KB (A) | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 |
|-----------+--------+-------+-------+-------+-------+-------|
| 512KB (B) | 1 & 2 | 1 & 2 | 2 & 3 | 1 & 2 | 2 & 3 | 2 & 3 |
|-----------+--------+-------+-------+-------+-------+-------|
| 1MB | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | JP31 | JP32 | JP38 | JP39 |
|--------------+------------+--------+-----------+-----------|
| 80486SX | pins 1 & 2 | Closed | N/A | pins 1 & |
| | closed | | | 2 closed |
|--------------+------------+--------+-----------+-----------|
| ODP486SX | pins 1 & 2 | Closed | N/A | pins 1 & |
| | closed | | | 2 closed |
|--------------+------------+--------+-----------+-----------|
| CX486DX | pins 1 & 2 | Closed | N/A | pins 1 & |
| | closed | | | 2 closed |
|--------------+------------+--------+-----------+-----------|
| AM486DX | pins 1 & 2 | Closed | N/A | pins 1 & |
| | closed | | | 2 closed |
|--------------+------------+--------+-----------+-----------|
| 80486DX | pins 1 & 2 | Closed | N/A | pins 1 & |
| | closed | | | 2 closed |
|--------------+------------+--------+-----------+-----------|
| UMCU5S | pins 2 & 3 | Closed | N/A | pins 2 & |
| | closed | | | 3 closed |
|--------------+------------+--------+-----------+-----------|
| CX486DX2 | pins 1 & 2 | Closed | N/A | pins 1 & |
| | closed | | | 2 closed |
|--------------+------------+--------+-----------+-----------|
| CX486DX2V | pins 1 & 2 | Open | pins 2 & | pins 1 & |
| | closed | | 3 closed | 2 closed |
|--------------+------------+--------+-----------+-----------|
| AM486DX2 | pins 1 & 2 | Closed | N/A | pins 1 & |
| | closed | | | 2 closed |
|--------------+------------+--------+-----------+-----------|
| (SL)AM486DX2 | pins 1 & 2 | Open | pins 1 & | pins 1 & |
| | closed | | 2 closed | 2 closed |
|--------------+------------+--------+-----------+-----------|
| 80486DX2 | pins 1 & 2 | Closed | N/A | pins 1 & |
| | closed | | | 2 closed |
|--------------+------------+--------+-----------+-----------|
| P24D | pins 1 & 2 | Closed | N/A | pins 1 & |
| | closed | | | 2 closed |
|--------------+------------+--------+-----------+-----------|
| AM486DX4 | pins 1 & 2 | Open | pins 1 & | pins 1 & |
| | closed | | 2 closed | 2 closed |
|--------------+------------+--------+-----------+-----------|
| 80486DX4 | pins 1 & 2 | Open | pins 1 & | pins 1 & |
| | closed | | 2 closed | 2 closed |
|--------------+------------+--------+-----------+-----------|
| P24T | pins 1 & 2 | Closed | N/A | pins 1 & |
| | closed | | | 2 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Type | JP40 | JP41 | JP42 | JP43 |
|--------------+------------+--------+-----------+-----------|
| 80486SX | pins 1 & 2 | N/A | pins 1 & | pins 1 & |
| | closed | | 2 closed | 2 closed |
|--------------+------------+--------+-----------+-----------|
| ODP486SX | pins 1 & 2 | N/A | pins 1 & | pins 2 & |
| | closed | | 2 closed | 3 closed |
|--------------+------------+--------+-----------+-----------|
| CX486DX | pins 1 & 2 | N/A | pins 1 & | pins 1 & |
| | closed | | 2 closed | 2 closed |
|--------------+------------+--------+-----------+-----------|
| AM486DX | pins 1 & 2 | N/A | pins 1 & | pins 1 & |
| | closed | | 2 closed | 2 closed |
|--------------+------------+--------+-----------+-----------|
| 80486DX | pins 1 & 2 | N/A | pins 1 & | pins 1 & |
| | closed | | 2 closed | 2 closed |
|--------------+------------+--------+-----------+-----------|
| UMCU5S | pins 2 & 3 | N/A | pins 1 & | pins 1 & |
| | closed | | 2 closed | 2 closed |
|--------------+------------+--------+-----------+-----------|
| CX486DX2 | pins 1 & 2 | N/A | pins 1 & | pins 1 & |
| | closed | | 2 closed | 2 closed |
|--------------+------------+--------+-----------+-----------|
| CX486DX2V | pins 1 & 2 | N/A | pins 1 & | pins 1 & |
| | closed | | 2 closed | 2 closed |
|--------------+------------+--------+-----------+-----------|
| AM486DX2 | pins 1 & 2 | N/A | pins 1 & | pins 1 & |
| | closed | | 2 closed | 2 closed |
|--------------+------------+--------+-----------+-----------|
| (SL)AM486DX2 | pins 1 & 2 | Closed | pins 2 & | pins 1 & |
| | closed | | 3 closed | 2 closed |
|--------------+------------+--------+-----------+-----------|
| 80486DX2 | pins 1 & 2 | N/A | pins 1 & | pins 1 & |
| | closed | | 2 closed | 2 closed |
|--------------+------------+--------+-----------+-----------|
| P24D | pins 1 & 2 | N/A | pins 1 & | pins 1 & |
| | closed | | 2 closed | 2 closed |
|--------------+------------+--------+-----------+-----------|
| AM486DX4 | pins 1 & 2 | Open | pins 1 & | pins 1 & |
| | closed | | 2 closed | 2 closed |
|--------------+------------+--------+-----------+-----------|
| 80486DX4 | pins 1 & 2 | N/A | pins 1 & | pins 1 & |
| | closed | | 2 closed | 2 closed |
|--------------+------------+--------+-----------+-----------|
| P24T | pins 1 & 2 | N/A | pins 1 & | pins 2 & |
| | closed | | 2 closed | 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Type | J2 | J3 | J4 | J5 | J6 | J7 |
|------------+-------+-------+-------+-------+-------+-------|
| 80486SX |Closed | Open | Open | Open |Closed | Open |
|------------+-------+-------+-------+-------+-------+-------|
| ODP486SX | Open |Closed | Open | Open |Closed | Open |
|------------+-------+-------+-------+-------+-------+-------|
| CX486DX | Open |Closed | Open |Closed | Open | Open |
|------------+-------+-------+-------+-------+-------+-------|
| AM486DX | Open |Closed | Open | Open |Closed | Open |
|------------+-------+-------+-------+-------+-------+-------|
| 80486DX | Open |Closed | Open | Open |Closed | Open |
|------------+-------+-------+-------+-------+-------+-------|
| UMCU5S |Closed | Open | Open | Open |Closed | Open |
|------------+-------+-------+-------+-------+-------+-------|
| CX486DX2 | Open |Closed | Open |Closed | Open | Open |
|------------+-------+-------+-------+-------+-------+-------|
| CX486DX2V | Open |Closed | Open |Closed | Open | Open |
|------------+-------+-------+-------+-------+-------+-------|
| AM486DX2 | Open |Closed | Open | Open |Closed | Open |
|------------+-------+-------+-------+-------+-------+-------|
|(SL)AM486DX2| Open |Closed | Open | Open |Closed | Open |
|------------+-------+-------+-------+-------+-------+-------|
| 80486DX2 | Open |Closed | Open | Open |Closed | Open |
|------------+-------+-------+-------+-------+-------+-------|
| P24D | Open | Open |Closed | Open | Open |Closed |
|------------+-------+-------+-------+-------+-------+-------|
| AM486DX4 | Open |Closed | Open | Open |Closed | Open |
|------------+-------+-------+-------+-------+-------+-------|
| 80486DX4 | Open |Closed | Open | Open |Closed | Open |
|------------+-------+-------+-------+-------+-------+-------|
| P24T | Open | Open |Closed | Open | Open |Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION |
|------------------------------------------------------------|
| Speed | JP22 | JP23 |
|------------------+--------------------+--------------------|
| 25MHz | pins 2 & 3 closed | pins 2 & 3 closed |
|------------------+--------------------+--------------------|
| 33MHz | pins 1 & 2 closed | pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| 40MHz | pins 1 & 2 closed | pins 2 & 3 closed |
|------------------+--------------------+--------------------|
| 50iMHz | pins 2 & 3 closed | pins 2 & 3 closed |
|------------------+--------------------+--------------------|
| 50MHz | pins 2 & 3 closed | pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| 66iMHz | pins 1 & 2 closed | pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| 75iMHz | pins 2 & 3 closed | pins 2 & 3 closed |
|------------------+--------------------+--------------------|
| 80iMHz | pins 1 & 2 closed | pins 2 & 3 closed |
|------------------+--------------------+--------------------|
| 83iMHz | pins 1 & 2 closed | pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| 100iMHz | pins 1 & 2 closed | pins 1 & 2 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DMA CONFIGURATION |
|------------------------------------------------------------|
| DMA | JP1 | JP2 |
|------------------+--------------------+--------------------|
| DMA 1 | pins 1 & 2 closed | pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| DMA 3 | pins 2 & 3 closed | pins 2 & 3 closed |
+------------------------------------------------------------+